The Execution Profile window shows a list of source locations and the number
of times those source locations have been executed. This window is only
available for targets that support the collection of jump trace information.

To activate the Execution Profile window:

The count value displayed is the number of times the first instruction of
the source code location has been executed. The source locations displayed are
target dependent: they could represent each statement of the program or each
jump target of the program. If however the debugger is in intermixed or disassembly
mode then the count values will be displayed on a per instruction basis.

The execution counts window is updated each time your program stops and the
window is visible so if you have this window displayed then single stepping
may be slower than usual.